Carbureter.



D. FERGUSSON s C.. L. SHEPPY.

GARBURETER.

APPLIOATION FILED JUNE 7, 1907.

Patented Dec. 14, 1909.

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D. FERGUSSON & C. L. SHEPPY.u

GARBURETER. APPLICATION FILED UNE 7, 1907.

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DAVID FERGUSSON AND CHARLES L. SHEPPY, OJS BUFFALO, N YORK, ASSIGNOM T0 THE GEORGE N. PERCECOMPANY, OF BUFFALO, NEW YORK.

CARBURETER.

To zZZ whom, 'it may concern:

Be 1t known that we, DAVID FERGUssoN and' CHARLES L. SHEPPY, citizens lof the UnitedStates residing at Buffalo, in the county of Erie and State of New Y'orlnhave invented anew and useful Improvement in Cai bureters, of which the following is a specification. Y

This invention relates .more particularly toautomatic' carburetersof the well known In carbureters embodying' the 11iventina--v the charge of explosive mixture admitted to' the engine is controlled by a hand-operated throttle valve and an auxiliary air- 'valve ,is provided 'which operates automatically to increase the supply of air as required, when an increased volume of the explosive mixture is demanded in the higher speedsl of the engine.

The principal objects of this inventionare to produce a carbureter of this type, of compact and simple construction in which the throttle valvev is so constructed and arranged that the opening thereof for the passage of the mixture will always be directly opposite and in close proximity tothe spray nozzle A of two sheets: Figure l is a sectional eleva# tion of a Heat-feed carbureter embodylng the invention. 2 isa fragmentary transso that a high velocityV of the air past .the spraynozzle will always be insured, regardless of the position of the valve and size of opening which it provides; also to so construct the throttle valve that in moving it from the closed to the full open position and vice versa, the 'valve opening-.will be gradually increased or decreased .in area, enabling a very accurate and delicate `;ontrol of the charge to the engine; also to so construct and position the auxiliary air valve that it will respond readily to changes in speed of the engine and will always act to gradually increase the supply of air to the mixing' lchamber ofthe carbureter even though the valve may be suddenly opened.

In' the accompanying drawings, consisting Y Specication of Letters Patent.

Application filed .Tune '7, 1907'. Serial No. 377,769.

verse sectional elevation thereof inline 2-2,

Fig. l. Fig. 3 is a horizontal section of the throttle valve and its chamber, inline 3 3, Fig. l.

elevation, similar to Fig. l, showing a different form of supplemental air valve. Fig. 5 is a horizontal section in line 54-5, Fig. 4.

Fig. 4 is a fragmentary sectionalv Patented Deci 14, VA 19091.

Like characters of reference referto like parts in the several figures.

The casing of the carbure-ter preferably consists of a lower part A which formsthe float chamber, and an upper part A which is secured by screws a, or other suitable faspart Vand forms the mixing chamber and iary air valve. i

AB represents the main air supply pipe which, as usual, preferably leads from the throttle valve chamber and carries the auXiltimings, on the open upper end of the lower 'vicinity of the engine exhaust so that the air 'therein is heated andin the construction illustrated, connects with the bottom central portion of the lower casing part A.

C represents an upright air passage connecting at its lower end with the air supply pipe and at its upper end with the mixing cha'niber D in the upper part of the casing. This air passage is preferably formed by an integral hollow column extendingv centrally up from the bottom of the lower partof the casing with its upper end entering a hole in the bottoml of rthe upper casing part.A The upper part of the air passage is contracted, as shown.

E represents the gasolene supply or spray I nozzle. This extends centrally up into the air passage C with its upper end, in which is the discharge orifice, located within the contracted upper portion of 'tte-air passage, near the top thereof. l

e represents the usual needle valveifor regulating'the size ofthe discharge orifice of the spray nozzle to control the discharge of gasolene.v This valve has a screwstem working in a screw-threaded bearing sleeve e2 and extends out through the air supply pipe, having an operating handle at its lower end and a nut e3 for securing it when adjusted. Y' The spray nozzle connects by one ormore` suitable supply passa es e4 withthe ioat chamberor reservoir' 'inthe lower casing-part A. l

' F" represents the'hoat; andv fthe valve operated .thereby for automatically malintaining the gasol'ene at the desiredlevelin the spray nozzle. lThe float chamber ispreferably annular in form, surrounding the air passage C, and the float isalso annular and surrounds'and is guided'in its'up and down i movements by the column .forming the air,

passage.. -A needleflo'at valve is-shown in the drawings, being -arranged vertically in the `.float chamber and sliding in bearings f f2 at theV top and vbottom of thevoat chamber. The conical lower end of the valve coperates with"A a seat against which it `is pressed by asuitable sprin f3 surrounding the Vvalve between an' adjusta le sleeve thereon and the upperbearing for the valve. The-valve is moved away rom its seat' to admit gasolene y to the float chamber, when the float descends to va predetermined'extent, by-a leverfg pivoted in, the-float chamber 'and bearing atopposite ends against the float-.and the -adjustable sleeve of the supply valve.

-1 represents, the throttle valve. This valve `isrpreferably of hollow cylindrical form and is arranged to oscillate abouta horizontal axis in a correspondingly shaped chamber formed b a` cylindrical wall or seat 'located. in' t e upper casing-part directly over .and in close proximity to the upper end of the airpassage. One end of the valve chamber 4is closed byla suitable cap or cover t" secured to the .adjacent `end 'of the upper casing-part, andthe opposite end thereof connects with a discharge assage .2 for 'the explosive: mixture -formed y a 'continuation of the valve seat curving upwardly through the upper casing-part'A The valve `seat z' has a hole-z'3 in its bttdm which is preferably of rectangular shape and is located with one e'dge'nearly vertically over the dis# charge orifice of the spray nozzle, and the valve has a coperating hole 4 adapted, by

1 turning the valve, to be placed into or out of register with the hole in the seat. The

hole in the valve is substantially similaiinl shape and s izeto the holein the seat but 'has-a V-sha ed notch in one edge thereof. By reason o this shapeand arrangement of the holes in the valve and .seat the valve can be turnedI to a position, shown by 'broken lines in Fig. l3,"in which only the V-shaped notch of the valve opening ,will register with the hole in the valve seat, thus leaving a very sinall-.openingjor the passage of the exp osive mixture. ut this opening 'is directly over the spray nozzle and the opening can be gradually increased to its largest areav by a comparatively short movementof the valve. The valve opening is' `always directly over and close to the spray'nozzle, andl consequently a highvelocity of the air past the spray nozzle isv always insured. A suitable stem orrod 7c is secured ttthe valve and preferably bears at `opposite ends, in suitable bearing holes inthi` cover plate z" and opposite end of the uppr. casing-part,

*rounding one side and the tov .tle valve Ychamber and the il sage "i2 by a right-angular partition Z. A'

.ply valve.

limiting one endof. the rod extending out lof the casingl and being provided with a levery la for turning the valve.'`

The mixingchamberdlj is formed in the I lulPel" Casing par? A below the -lthrottle valve. chamber, and theA mixing chamber is preferably separated from the space sur of the tlirot ischarge paswater jacket L is'thus provided partially surrounding the throttle valve chamber and discharge passag'e,land connections Z Fare provided for circulating hot 'waterthrough this jacket for heatingthe explosive mixture.

M, Fig. 1, representsv an auxiliary airlsup- Thevalve shown in Fig. 1 consists of a circular disk and is arranged to move vertically within a ring or sliellm" vwhich vis secured byscrews, or otherwise, on

top of theuppe'r casing part- A at one side of the. throttle valve chamber.. Thisrng has an internal shoulder against which the valve seats, and a skirt depending into the mixingchamber D and provided with V- shaped notches or-serrations mf. The valve hasa vertical stem mi'l extending upwardly through asuitable guide bearing m3 on the valve ring, and is normally held up 'against --the seat by a suitable spring m4 surrounding the valve stembetween its bearing and an adjusting nutA m5 screwed on the upperend 'of the, valve stein.' i

- its side and end openings covered by screens a, for the purpose of screening the rair ad-l f initted to the carbureter by the auxiliary valve. a -Tlie auxiliary air valve, located in this position, fis close to the throttle valve 'opening' and will respond nicely to fluctuations of suction in the mixing chamberdue to changesinspeed of the'engine, so as to increase or diminish thel airsupply in accordance with the needs of the engine, but

its position is such as not to obstruct in any way the passage of the charge to the engine.

The Vfshaped notches in the skirt'of the valve ring make it impossible for the val've leven though suddenly opened to suddenly admit large volumes of air. The volume of air can only be increased gradually and in proportion to tiie'increased speed of the engine.

` In Figs. and 5 means of different constructionbut arrangedl in the same location la-ie'employed for. similarly admitting the supplemental air gradually to the mixing balls being lightest will bel'hrs suction 'and as thesnctiqn increases it will lift the balls' one 'aftrthc-other,laccor`ding by graduated balls p' seated in the openings.

he-movementof the balls is regulated by adjustable stop screws f p2. lThe fif'gmallest t lifted by the to'their size, and thus gradually increase the A Avolume of `supplemental air admitted. Still other forms v'15 valves or means could be employed.

We claim 'as our invention: -V

1. In a carbureter, the combination of a casing having a wall' of circular cross-section l forming a throttle valve chamber, said wall vhaving in one side a hole for the passage of the explosive mixture, an air supply passage oppositeto the hole in said valve chamber wall, and amixing chamber having a portion which is located between said-circularwall and said air supply. passage and is relatively narrow in the direction 'of the length ofthe air supply passage whereby one end of the airsuppY passage is located 'close 'to said circular watl a ,spray nozzleextending into said air passage and having a discharge orice opposite and adjacent to said hole, aniauxiliary airsupply valve for ad# rmitting air to said mixing chamber, and a throttle valve in said'valve chamber 'having a hole adaptedto be moved into and out o 4'register with the hole in Said cylindrical -wall' byvturning said valve, substantially asset forth. r".'

' 2. -In a carbureter, the combination of an air supply passage, a spray nozzle extending into said air passage and having a discharge' orifice adjacent to the upper end thereof, a

throttle valve chamber of circular cross-se'cv. vtion arrangedabove and transversely '-with- 4.5v

respect to said air passage and having an opening for the passa-ge` of the explosive imity to Vthe. discharge y mixture located opposite-fand in close prox# nozzle, and a mixing chaniberhaving a pormixing chamber,

tion `locatedbetween the upper end 'of said.

air supplypassage and said throttle'valve chamber which is relatively narrow in the direction of the length oi said air lf'passa,fg;e,va throttle valve arranged andl out of're 'sterfwith the hole in said chamber, one o portion whereby the sizeof the opening for iary mitting air to said substantially as set forth.

3. In a carbureter, the combination of a' casinor .having a wall of circular cross section iorming a throttle' valve chamber,- said Wall having afhole for'the passage 'of the air supply means for ad of supplemental air admission y regulating the' -eed' oflthe rice of thespray to turn in said valveV chamber to placca hole in thefvalve into.

saidholes having'a 'V-shaped' divided by explosive mixture, an air supplypassage having one endlocated opposite tothe hole 1n said valve chamber wall,'and amixing chamber between said circular wall and Said air supply passage, a spray nozzle extending into said air passage and'having a discharge orifice substantiallyopposite to one edge of the hole in Asaid valve chamber wall, and a Ihollow throttle .valve'in said valve chamber -and havinga hole which coperates with said hole in said valve chamber wall, one of said holes having a V-shapedvportion wherebythe size of the'opening for the passage off the explosive mixture is gradually changed by turning said valve and said opening Ais lalways kept opposite to said spray nozzle, substantially as set forth.

4. In a carburetor, the combinationof an air supply passage, a spray nozzle extending into said air passage, and having a discharge orifice adjacent to the upper end thereof, an

annular oat chamber surroundingsaid'air' passage, an annular float in saidV chamber for 'fuel to said spray nozzle, a cylindrical throttle valve chamber arranged horizontally above said air passage with-a hole in its bottom over and close to the dlscharge orifice of said spray nozzle, a mixing chamber between the' upper'end of said air` supply passage and said throttle valve chamber, auxiliary air supply `means hollow cylindrical throttle valve in said valve chamber and having a hole in its cylindrical wall adapted to be placed into andout of register with a hole in the bot-tom of said valve chamber by turning said valve and also 'having a discharge hole, and a discharge passage connecting with the discharge hole of said throttle, valve, substantially as set forth. y f

` 5. In acarbureter, the combination of a lmain air supply passage, a Ithrottle Valve chamber arranged transversely opposite to oneendpf saidgair supply passage and separated'the'refrom by a -in chamber, ho

a'- throttle valve arranged tol'turn in said chamber to control said hole, a spray nozzle .for the liquid vhydrocarbon having a discharge orifice'in said air passage opposite andA adjacent to said hole in the wall of the throttle valve chambelg, and automatic auxiliary, air supply means` consisting of a circular'disk arrangedtqmove in a serrated ring, thus controlling'the inlet opening of 'saidmixing chamber -ing the How of air in proportion to the suction of the en ine,substantially as set forth.

, 6. In a carureter, the combination of a casing comprisingan upper part whiich is a circular .Wall into a throttle valve chamber and a mixing chamber having an auxiliary air inlet opening at one side,

said valve chamber' having a space forming a mixand gradually increas-v for admittingairI to said mixing chamber, a

ein its wall opposite to said air'passage,

iatwv l passage communicatingwith saiclv mixingf chamber in the nppei"l casing part, an annu-- lar. float chamber surrounding said air pas!- sagega rotatable throttle Valve in said `valve sage' with its discharge orifice immediately 'un-der the hole in the throttle valve, a float J in said float chamberfor regulating the suptiallyasset forth;l y l fitness our hands 'int-he presence two Magee ply-of fuel vto' thespray inozzle, and means` foi' reg-Meting the' admission of air through. said aiuuliary air.

inlet opening, substanl5 l subscnibing' WitneSses. n chamber having a hole'adpted to register j: f with a hole in said circular Wall, -a spray. y nozzle for the fuel located in said 'air pas- DAVID -iusRGUSSoN, i CHARLES fSHElfPY. Witnesses: v l i I C. B. HoRNnEoIg, f v 

